International Tax Support for Law Firms & Their Clients
McGuire Advisory partners with attorneys whose clients hold interests in foreign corporations, partnerships, or funds. We provide white-label or joint CPA support for complex U.S. international tax filings — 5471, 8865, 8858, 8621, 926, and foreign tax credits — prepared accurately, confidentially, and on time.
When Law Firms Partner With Us
We work with estate planning, corporate, and international counsel who need specialized CPA expertise on foreign reporting obligations. Each engagement is discreet, well-documented, and integrated with your firm’s client strategy.
Foreign Corporations — 5471
Ownership classification, E&P tie-outs, Subpart F / GILTI review, and reconciliation to client financials.
Foreign Partnerships — 8865
Category analysis, partner allocations, basis tracking, and K-1 alignment.
FDEs & Branches — 8858
Branch financial translation, currency treatment, and U.S. bridge adjustments.
PFICs — 8621
QEF/MTM election analysis, statement review, and annual compliance reporting.
Transfers to Foreign Corps — 926
Property transfers, thresholds, and basis disclosure coordination with counsel.
Foreign Tax Credits — 1116 / 1118
Category classification, limitation calculations, and double-tax mitigation.
Typical Attorney Engagements
Fees depend on entity complexity and required coordination; most fall between $2,500 – $4,500 per entity, always defined by written scope.
| Engagement Type | Example Scenario | Typical Range |
|---|---|---|
| Single-Entity Filing | One controlled foreign corporation with clean records | $1,800 – $2,300 |
| Multi-Owner Coordination | Several U.S. shareholders, multiple schedules, attorney liaison | $2,400 – $3,000 |
| Complex / Multi-Year | Subpart F / GILTI or prior-year remediation | $3,000 + |
Engagement letters outline scope, timing, and confidentiality terms before work begins.
Our Collaborative Process
- Discovery — confirm facts, entities, and exposure.
- Coordination — align with counsel on scope, deadlines, and communications.
- Preparation — draft filings, review with attorney, finalize submission.
- Follow-Through — documentation and year-over-year continuity.
“Technical precision. Predictable workflow. Complete discretion.”
Why Firms Choose McGuire Advisory
- Attorney-focused collaboration — white-label or joint representation.
- Direct CPA contact — no layers or outsourcing.
- Secure, modern process — encrypted portal and e-signatures.
- Fixed-fee transparency — no surprise billing.
- Cambridge-based, serving clients nationwide.
Frequently Asked by Attorneys
Can you work directly with our clients?
Yes. Engagements can be white-label under your firm or direct with the client under joint coordination. We maintain confidentiality and share deliverables for your review before submission.
Do you handle correspondence with the IRS?
We can respond to administrative notices related to filings we prepare, keeping your firm copied on all communications.
What’s your turnaround time?
Most single-entity filings are completed within 2–4 weeks after document receipt. Multi-entity or multi-year matters are quoted individually with clear timelines.
Can you coordinate with foreign accountants?
Yes. We frequently reconcile IFRS or local-GAAP statements to U.S. tax bases and can liaise with offshore accountants as part of the process.
Explore Partnership Opportunities
Schedule a brief call to discuss how McGuire Advisory can support your firm’s international or cross-border matters.
📧 michael@mcguireadvisory.com · 📍 Cambridge, MA